LMS 200 / LMS 211 / LMS 220 / LMS 221 / LMS 291
Transcription
LMS 200 / LMS 211 / LMS 220 / LMS 221 / LMS 291
E S C R I P T I O N D E C H N I C A L T LMS 200 / LMS 211 / LMS 220 / LMS 221 / LMS 291 Laser Measurement Systems Contents Technical Description LMS 2… Laser Measurement System Contents 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2 Range of applications ...................................................................................................................... 3 Product features ................................................................................................................................. 4 Operating principle ............................................................................................................................ 6 Conditions of use/range ................................................................................................................. 7 4.1 Mounting location ....................................................................................................................... 7 4.2 Heater operation ........................................................................................................................ 7 4.3 Reflectivity of various objects ................................................................................................ 7 4.4 Reflectivity in fog ......................................................................................................................... 8 4.5 The „blanking“ curve ................................................................................................................. 9 4.6 The „contour as reference“ curve ........................................................................................ 9 Areas of use ...................................................................................................................................... 10 5.1 Object measurement/determining position ................................................................... 10 5.2 Area monitoring/Detection .................................................................................................. 11 Mounting ............................................................................................................................................ 12 LMS 211/LMS 220/LMS 221 electrical installation...................................................... 14 7.1 Data interface ........................................................................................................................... 14 7.2 Power supply ............................................................................................................................ 14 7.3 Motor flap for the LMS 211 ................................................................................................ 15 7.4 LMS 211/LMS 221 electrical connection ..................................................................... 16 7.5 LMS 211/LMS 221 electrical connection with relay output .................................... 17 LMS 200/LMS 291 electrical installation ........................................................................... 18 8.1 Electrical connection ............................................................................................................. 18 8.2 Interface plugs (plug modules) ......................................................................................... 18 8.3 LMS 200/LMS 291 electrical connection .................................................................... 19 8.3.1 RS 232/RS 422-conversion ........................................................................... 19 8.3.2 Cable entry in plug module .............................................................................. 20 8.3.3 Functions of the indicator lights ..................................................................... 20 Synchronisation of two laser scanners .................................................................................. 21 9.1 Pre-conditions for synchronisation .................................................................................... 21 9.2 Procedure ................................................................................................................................... 21 9.3 Commissioning synchronisation ........................................................................................ 22 Heating plate for the LMS 200/LMS 291 ........................................................................... 23 Weather protection for the LMS 220/LMS 221 ................................................................ 25 Dimensional drawings .................................................................................................................. 26 Overview of LMS variants ............................................................................................................ 33 Technical data .................................................................................................................................. 34 Order numbers ................................................................................................................................. 35 Glossary of terms ........................................................................................................................... 37 EC Declaration of Conformity .................................................................................................... 38 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Range of applications Chapter 1 LMS 2… 1 Range of applications LMS 200, LMS 220, LMS 211, LMS 221, LMS 291 Laser Measurement Systems • • • • • • • • • • Determining the volumes or contours of bulk materials Determining the volumes of objects (measuring packages, pallets, containers) Determining the position of objects (pallets, containers, transport vessels) Collision prevention for vehicles or cranes Controlling docking processes (positioning) Classification of objects (vehicle detection, camera trigger) Process automation (e.g. calender rollers) Checking overhang/area monitoring in automated multi-storey car parks Monitoring open spaces for building security (facades, grounds, shafts) and many more Fig. 1-1: Collision prevention on container cranes Fig. 1-2: Measuring bulk materials on conveyor belts or in bunkers Fig. 1-3: Monitoring open spaces for building security Fig. 1-4: Collision prevention Fig. 1-5: Collision prevention at the harbour Fig. 1-6: Detection of objects ? ? Fig. 1-7: Classification of vehicles 8 008 970/06-2003 ? ? ? ? Fig. 1-8: Your application Fig. 1-9: Checking overhang in automated multi-storey car parks © SICK AG · Division Auto Ident · Germany · All rights reserved 13 Product features Chapter 2 Technical Description LMS 2… Laser Measurement System 2 Product features LMS 2.. laser scanners are non-contact measurement systems (NCSDs), that scan their surroundings two-dimensionally (laser radio). As scanning systems the devices require neither reflectors nor position marks. The systems are used for: • • • area monitoring object measurement and detection determining positions Defined monitored fields can be programmed in the scanner for the area monitoring application. Each monitored field is assigned a 24 V switching output. The LMI interface module is available as an optional extension to the system. It can administer several scanners and provides the corresponding 24 V switching outputs. Standard solutions are available for object measurement, e.g. measuring the volumes of packages and pallets; volume flow measurement for bulk materials; etc. The scanner’s measurement data can be individually processed in real time with external evaluation software for determining positions and other measurement tasks. Maintenance and care The LMS scanner requires no maintenance, though depending on its location the scanner’s front window should cleaned occasionally. Please note: Never open the laser scanner yourself! The producer warranty will be forfeited if the scanner is opened. Erroneous functions can be clarified by means of the LMS/LMI User Software error diagnosis. The SICK Service team is available for handling more serious errors. Errors caused by a contaminated front window are indicated via the built-in LEDs (see Table 8-1). ! 42 Please note: LMS laser scanners are not devices for protecting persons as defined by current machine safety standards. © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Product features Chapter 2 LMS 2… Features and advantages • • • • • • • • • • Non-contact optical measurement, even over longer distances Rapid scanning times, thus measurement objects can move at high speeds No special target-object reflective properties necessary No reflectors and no marking of the measurement objects necessary Backgrounds and surroundings do not have any influence on the measurements Measurement objects may be in any position Measurement data is available in real time and can be used for further processing or control tasks Active system – no illumination of the measurement area required Simple mounting and commissioning Completely weatherproof variants See also 12 Overview of LMS variants 8 008 970/06-2003 Fig. 2-1: LMS 200 Fig. 2-2: LMS 220 Fig. 2-3: LMS 291 Fig. 2-4: LMS 221 © SICK AG · Division Auto Ident · Germany · All rights reserved Fig. 2-5: LMS 211 35 Operating principle Chapter 3 Technical Description LMS 2… Laser Measurement System 3 Operating principle The LMS system operates by measuring the time of flight of laser light pulses: a pulsed laser beam is emitted and reflected if it meets an object. The reflection is registered by the scanner’s receiver. The time between transmission and reception of the impulse is directly proportional to the distance between the scanner and the object (time of flight). The pulsed laser beam is deflected by an internal rotating mirror so that a fan-shaped scan is made of the surrounding area (laser radar). The contour of the target object is determined from the sequence of impulses received. The measurement data is available in real time for further evaluation via a serial interface. Automatic fog correction is active in the scanner for outdoor use. Raindrops and snowflakes are cut out using pixel-oriented evaluation. Fig. 3-1: Operating principle Spot spacing/spot diameter/range In a radial field of vision, a light impulse (spot) is emitted every 0.25°, 0.5° or 1° (depending on the variant). As a result of the beam geometry and the diameter of the individual spots, the spots overlap on the target object or up to a certain distance. Fig. 3-2 shows spot spacing in relation to the range and the corresponding spot diameter. 35 Spot spacing for angular resolution of 1° Spot diameter/ spot pspacing [cm][ ] 30 Spot spacing for angular resolution of 0.5° 25 20 Spot spacing for angular resolution of 0.25° 15 10 Spot diameter LMS 211/221/291 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Spot diameter LMS 200/220 Range [m] Fig. 3-2: Spot sizes/spot spacing 6 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Conditions of use/range Chapter 4 LMS 2… 4 Conditions of use/range 4.1 Mounting location The scanner may be installed in any position. The mounting instructions in Chapter 6 are to be observed. 4.2 Heater operation (LMS 220 and LMS 211/LMS 221) In order to be able to use the LMS at temperature ranges below 0° C, a thermostatcontrolled heater has been installed in these scanners and supplementary front window heating in the LMS 211. The heating comes into operation at ≤ 10° C order to prevent thawing within the housing. Before commissioning the LMS (e.g. before starting work) the interior of the scanner must be heated to at least 0° C and any ice on the front window must be melted. The scanner takes approx. 120 min. to heat up at an outdoor temperature of –30° C. 4.3 Reflectivity of various objects The range of the scanner depends on the reflectivity of the target object and the transmission strength of the scanner. Some reflectivity values for well-known materials have been included below as an overview (KODAK standards). LMS with standard range without fog correction: LMS 200-30106 LMS 220-30106 LMS 211-30106 LMS with high range and fog correction: LMS 211-30206 LMS 211-S07 LMS 221-30206 LMS 221-S07 LMS 291-S05 LMS 211-S12/S13/S14 Reflectivity [%] 600 Material Cardboard, matt black Cardboard, grey Wood (raw pine, dirty) PVC, grey Paper, matt white Aluminium, anodised, black Steel, rust-free shiny Steel, very shiny Reflectors 100 10 1 0,1 Fig. 4-1: 8 008 970/06-2003 1 Range [m] 10 Reflectivity 10% 20% 40% 50% 80% 110…150% 120…150% 140…200% > 2000% 60 LMS 200/LMS 220 Range in relation to object reflectivity © SICK AG · Division Auto Ident · Germany · All rights reserved 17 Chapter 4 Conditions of use/range Technical Description LMS 2… Laser Measurement System 100 90 LMS 211 typ. new device with clean front window LMS 221 LMS 291 typ. new device with clean front window 80 Reflectivity [%] 70 60 50 LMS 211 typ. new Neugerät devicemit with Verschmutzung pollution (warning (Warnsignal signal active) aktiv) LMS 221 LMS 291 typ. new device with pollution (warning signal active) 40 30 20 10 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Range [m] Fig. 4-2: LMS 211, LMS 221, LMS 291, relationship between reflectivity and range with good visibility In exceptional cases, sensitivity can be changed with the user software provided: • • • values for standard setting (see diagram): 30 m range/10% reflectivity values for less sensitive thresholds: 25 m range/10% reflectivity values for more sensitive thresholds: 30 m range/5% reflectivity Please note: Note the remission graph in the range 0 to 1,5 m for LMS 211/LMS 221/LMS 291. Higher sensitivity improves detection capabilities for dark objects, but increases ambient light sensitivity. Lower sensitivity reduces detection capabilities for dark objects, but reduces ambient light sensitivity. 4.4 Reflectivity in fog (LMS 211-30206/LMS 221-30206/LMS 291-S05) Fig. 4-3 to Fig. 4-6 are valid should there be fog during outdoor operation and are to be observed. 100 typ. reflectivity at nominal visibility Reflectivity [%] 90 80 50 m 70 100 m 60 200 m 500 m 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Range [m] Fig. 4-3: LMS 211 – relationship between reflectivity and range in fog 8 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Conditions of use/range Chapter 4 LMS 2… 100 typ. reflectivity at nominal visibility Reflectivity [%] 90 80 50 m 70 100 m 60 200 m 500 m 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Range [m] Fig. 4-4: LMS 221/LMS 291 – relationship between reflectivity and range in fog 4.5 The „blanking“ curve (LMS Outdoor and LMI 400) The object suppression software setting is dependent on distance. An object can only be suppressed up to a certain distance. Furthermore, the scanner switches independently of object size. 30 Measurement distance [m] LMS/LMI 400: angular resolution 1 25 20 15 10 5 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Suppressible object diameter [m] Fig. 4-5: Relationship between the usable range and the defined blanking diameter, e.g. max. 17 m with the blanking diameter of 0.3 m. 4.6 The „contour as reference“ curve (LMS Outdoor and LMI 400) The contour as reference software setting is dependent on distance. The scanner requires a minimum contour as reference depending on the distance. Loss of the contour will not be switched at the switching output if the contour is too small. Measurement distance [m] 30 25 20 LMS/LMI 400: angular resolution 1 15 10 5 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Reliably detectable object diameters in relation to defined blanking diameter [m] Fig. 4-6: Relationship between the usable range and reliably detected object diameter, e.g. the LMS switches if it loses the contour in 17 m with a object diameter of 0.3 m. 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 39 Chapter 5 Areas of use Technical Description LMS 2… Laser Measurement System 5 Areas of use One distinguishes between three areas of use: • • • object measurement determining position area monitoring 5.1 Object measurement/determining position Laser scanner measurement data is used for object measurement and determining position. These measurement data correspond to the surrounding contour scanned by the device and are given out in binary format via the RS 232/RS 422 interface. The telegram listing required is supplied with the device. Our MST Measurement Software Tool provides further support for software connections to the LMS laser scanner (please see separate Technical Description, order no. 8008464). Processing measurement data Processing measurement data allows individual adaptation to the system’s particular measurement task. Possible data preparation within the LMS: • • Average value formation from 2 - 250 scans Limiting the sector from which values are transferred (e.g. beams 10 - 30) for data reduction Possible external data processing: • • • • • Evaluation of partial sectors of the 100° or 180° field of view Averaging of the measurement values transferred (increasing accuracy and smoothness) Straight line and curve approximations by interpolation of measurement values Determination of position/volume of any objects 3rd dimension provided by shaft encoder, etc. (length information/speed of transport) External evaluation (software) can take place at a PC or SPC. Fundamentally, the distance value per individual impulse (spot) is evaluated. This means that a distance value is provided every 0.25°, 0.5° or 1°, depending on the angular resolution of the scanner. Angular resolution max. scanning angle *) max. no of measured values 0.25° 100°/180° 0.25° 180° 0.5° 100°/180° 401 721 361 4x1°-values, interlaced 1° 100°/180° 181 *)symmetrical, from the middle Angular resolution is set using a software telegram. 10 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Areas of use Chapter 5 LMS 2… As the individual values are given out in sequence (beginning with value 1), particular angular positions can be allocated on the basis of the values’ positions in the data string. Note that the LMS turns towards the left (see Figs. 5-1 and 5.2). In its default state the scanner is set to the “Measured values on request” mode and “Transfer rate 9,600 baud” (changes can be made using the appropriate telegram commands). It is recommended that the scanner is operated in the “9,600 baud on Power-on” mode (default setting). Conversion to a different baud rate can take place after the complete system has been started up. 5.2 Area monitoring/Detection Here, the system is responsible for automatically reporting that an area „is free“. This means that an infringement of a field, e.g. by an object or machine part, leads to a switching signal at an output. Pixel-oriented evaluation/object blanking Pixel-oriented evaluation is used for suppressing raindrops and snowflakes or other particles, and thus makes the system less sensitive to environmental factors. This involves saving the sequential messages (measured values) from each individual spot in each scan, and a separate counter being started for each spot. Erroneous measurements can be filtered out by repeatedly examining the reported spot (multiple scanning whose number depends on the setting selected). Pixel-oriented evaluation should be included in the corresponding evaluation software when external data processing is undertaken. Object blanking is used for suppressing an object that is not to be detected, e.g. a steel cable, that is located within the monitored field. last value first value last value scanning angle 100° Fig. 5-1: Direction of transmission for LMS 211 scanners 8 008 970/06-2003 first value scanning angle 180° Fig.5-2: Direction of transmission for LMS 200, LMS 220, LMS 221, LMS 291 scanners © SICK AG · Division Auto Ident · Germany · All rights reserved 11 3 Chapter 6 Mounting Technical Description LMS 2… Laser Measurement System 6 Mounting Mounting sets (see Fig. 6-1) are available for easy installation. They allow adjustment of devices in both axes, as shown. The scanner can be installed in any position, though direct sunlight on the front window is to be avoided (to prevent dazzle). Outdoor variants should generally be mounted in such a way that the connection plug is located on the lower right-hand side of the back plate in order not to affect pollution measurement (exit window). Outdoor installation: An appropriate sunshade is to be provided to prevent direct sunlight falling on the scanner housing (sheet metal, etc, see Fig. 6-2). Threaded holes are provided on the rear of the scanner for attachment (LMS 211/221/220). A dust prevention shield is recommended for preventing dust and/or condensation on the front window (see LMS 211). Purging air can be used if dust is present in large quantities. The cap of the optional connection socket (motor flap) must be screwed in (to maintain the enclosure rating). LMS 211 dust shield ± 7,5° ± 7,5° Fig. 6-1: Mounting set for LMS 220/LMS 211/LMS 221 Fig. 6-2: Sunshade (examples) 12 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technicall Description Mounting Chapter 6 LMS 2… Fig. 6-3: Attachment set for mast mounting of LMS 220/LMS 211/LMS 221 Fig. 6-4: Mounting set for LMS 200/LMS 291 Fig. 6-5: Weather protection for LMS 220/LMS 221 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 13 3 Chapter 7 LMS 211/220/221 electrical installation Technical Description Laser Measurement System LMS 2… 7 LMS 211/LMS 220/LMS 221 electrical installation The scanners’ operating voltage is 24 V DC ± 15%. 7.1 Data interface The data interface of the scanners is for setting parameters using a PC and for data exchange on external software evaluation (e.g. with SICK’s LMI Laser Measurement Interface). The interface type may be selected as RS 232 or RS 422 by bridging in the connection plug. A prepared service cable is available for setting parameters (see 14: Order numbers). Please note: A shielded cable with “twisted pair” wires (2x2 TP, see 14: Order numbers) is required for operation with external data evaluation in real time. 7.2 Power supply The electronics of the scanners is fed directly from a stabilised 24 V DC mains adapter. The LMS 211/LMS 220/LMS 221 scanner heater is regulated internally by a thermostat. An unregulated 24 V DC mains adapter is sufficient for power supply for the heater (current uptake of active heater is approx. 5 A). In the LMS 211/LMS 221, separate connection terminals are available in the connection plug for the scanner heater/motor flap. By using separate wiring it is possible to keep the heater in operation even when the scanner is switched off for longer periods – in order to maintain the operating temperature at a suitable level until the scanner is switched back on (prevents subsequent thawing within the scanner). 2 DC 24 V = 2 heater DC 24 V = ≈ ≈ sensor 3 LMS switching outputs 2 or LMS heater sensor 3 switching outputs control cabinet Fig. 7-1: Wiring for stand-alone operation (switching applications) 2 DC 24 V = 2 heater sensor (motorRS 422 flap) DC 24 V = ≈ ≈ control system evaluation 2x2 TP LMS or host computer/ PC 2 heater sensor (motorRS 422 flap) control cabinet LMS Fig. 7-2: Wiring with external data processing 14 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description LMS 211/220/221 electrical installation Chapter 7 LMS 2… 2 DC 24 V = ≈ switching outputs 2 2 heater sensor (motorflap) RS 422 LMS 2x2 TP DC 24 V RS 422 LMI control cabinet Fig. 7-3: Wiring in conjunction with LMI Please note: Observe acceptable voltage drops through the cable. The entire heating capacity (required at temperatures below –10°C) is only available with at least 24 V rated voltage (see 13 Technical data). The voltage drop through cables at a current flow of 5 A is 0.114 V/m with a cable cross-section of 1.5 mm2 and 0.075 V/m with a cross-section of 2.5 mm2. 7.3 Motor flap for the LMS 211-S12 The optional motor flap in the dust prevention shield is connected directly to the LMS using the prepared plug (socket at the rear of the housing). The LMS heater power supply must be connected to operate the motor flap. Configuration takes place using the LMI user software, by separate data telegram to the LMS, or with a 24 V DC control voltage on pin 5 of the connection plug (see also Fig. 7-4). If the motor flap is not in use, or is no longer in use, the connection socket must be covered with the cap (to maintain the enclosure rating). 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 15 3 LMS 211/220/221 electrical installation Chapter 7 Technical Description Laser Measurement System LMS 2… 7.4 LMS 211/LMS 220/LMS 221 electrical connection data cable reference earth (screen) 1)) without jumper RS 232, with jumper RS 422 RxD– 1 9 TxD– RxD+ 2 10 TxD+ RS 232/RS 422 1) heater, motor flap GND FC 2) 3 11 RS 232/RS 422 1) 12 heater 24 V/5 A, motor flap 13 OUT A 4 5 2)) Control of motor flap x 6 14 OUT B Weak/Out C 7 15 restart scanner GND 8 16 scanner 24 V/1 A Either internally controlled (data telegram or configuration via user software) or externally via 24 V DC control voltage at terminal 5 (FC = Flap Control) Internal control Jumper from OUT A to FC (terminals 5–13) OUT A provides the control voltage here, function can be defined via software External control Wire terminal 5 (Flap Control) with 24 V DC external control voltage 24 V = flap open 0 V = flap closed Ucontrol = 24…48 V DC I ≤ 30 mA x = reserved, not wired Please note: provide current limitation (e.g. fuse) for external power supply heater, motor flap PC or evaluation LMS PC/LMI evaluation LMS TxD+ (10) (2) RxD RxD– (1) TxD– RxD+ (2) (3) TxD RxD+ (2) TxD+ GND (5)GND TxD– (9) RxD– TxD+(10) RxD+ (3) Wiring the RS 232 interface (11) screen Wiring the RS 422 Fig. 7-4: LMS connection plug/interface wiring terminal allocation – Fig. 7-5: Service cable for setting parameters (prepared as RS 232 for PC, can also be used for RS 422 with jumper between terminals 3-11) + RxD– RxD+ TxD+ TxD– 1 2 10 9 3 11 FC Out A Out B Out C Res 24V GND 24V GND 5 16 13 14 7 15 8 12 4 LMS interface type jumper: RS 422 screen without jumper: RS 232 RS 232 RS 422 FC switching outputs restart scanner external +24V +24V heater Fig. 7-6: LMS 211/LMS 221/LMS 220 wiring 16 4 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description LMS 211/220/221 electrical installation Chapter 7 LMS 2… 7.5 Electrical connection LMS 211/LMS 221 with relay outputs Ground reference data cable (shield) RxD– 1 9 TxD– RxD+ 2 10 TxD+ RS 232/RS 422 1) 3 11 RS 232/RS 422 1) Heating GND 4 12 Heating 24 V/5 A 13 OUT B.2 OUT A.1 5 OUT A.2 6 14 OUT B.1 Weak/OUT C 7 15 Restart Scanner GND 8 16 Scanner 24 V/1 A Factory setting of relay outputs Normally Open N.O.: LMS-field clear = contact closed 1) without jumper RS 232, with jumper RS 422 Fig. 7-7: Layout of the connection plug a RxD– RxD+ TxD+ TxD– 1 2 10 9 b Out A 3 11 5 6 Out B 13 14 Out C Res 7 15 24V GND 24V GND 16 8 12 4 Weak Interface type: Relay outputs jumper: RS 422 Shield no jumper: RS 232 RS 232 RS 422 Restart +24V Sensor Heating Fig. 7-8: Connection diagram of LMS 211/LMS 221 with relay outputs Note: Motor flap on LMS with relay outputs not applicable. Behaviour of the switching outputs All LMS types are designed in such way, that the switching outputs are active (24 Vlevel) if the corresponding monitored field is clear. If, however, a field is infringement the relevant output switches to 0 V-level. The contacts of LMS units with relay output on OUT A and OUT B are set to N.O. function. The corresponding contact is closed when the monitoring field is clear and opens if there is a field infringement. This functionality of the switching outputs means, that the connecting cables are automatically monitored for any breaks. Output OUT C is designed to act as a regular field output but automatically assumes an error signalling function if there is a break (see also Chap. 8.3.3). 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 17 5 Chapter 8 LMS 200/LMS 291 electrical installation Technical Description LMS 2… Laser Measurement System 8 Electrical connection LMS 200/LMS 291 8.1 Electrical connection Scanners require an operating voltage of 24 V DC ± 15% with a power consumption of ≤ 20 W plus the load on the three possible outputs OUT A (max. 250 mA), OUT B (max. 250 mA) and OUT C (max. 100 mA). The restart input can be allocated as restart or for changing field (see LMS/LMI User Software Operating Instructions for details). Power is supplied to the devices using a plug-in connection box with a high enclosure rating (see Fig. 8-2), while interface connection takes place through another connection box (RS 232 or RS 422). 3 2 1 2 4 5 1. Scanner 2. Plug module with interface cables to evaluation unit (e.g. switching cabinet, SPC, PC, etc.) or interface cable for temporary connection to PC for configuration and servicing of the device 3. Connection cable for power supply and switching cables to a machine or a switching cabinet 4. PC for configuration and servicing 5. 3.5" diskette with LMS User Software Fig. 8-1: LMS 200/LMS 291 components and typical set-up 8.2 Interface plugs (plug modules) The interface plugs are built into plug modules. Only when attachment of the plug modules to the sensor has been completed does the device correspond to the IP 65 design and EMC requirements (ESD) according to CE. interface plug power supply plug cable connection possible from above and from rear Furthermore, please note that regarding ESD protection the LMS should only be operated with the plug modules mounted. Fig. 8-2: Scanner with plug-in connection boxes 18 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description LMS 200/LMS 291 electrical installation Chapter 8 LMS 2… 8.3 LMS 200/LMS 291 electrical connection 1 2 3 4 5 6 7 8 9 Input/ output GND_EXT (earth) – Restart E VCC_EXT (24 V DC ± 15%) NC – OUT C/weak signal A NC – NC – OUT B A OUT A A Wire colour brown blue red grey turquoise orange 1 5 6 9 1 2 3 Ltg.Ø 4…8 mm 6x 0,5 mm2 PIN Signal designation GND_EXT Restart VCC_EXT (24 V DC ± 15%) 4 NC 5 OUT C/Weak 6 NC 7 NC 8 OUT B 9 OUT A Imax=250 mA Please note: Provide current limitation (e.g. fuse) for external power supply Fig. 8-3: LMS 200/LMS 291 power supply plug 8.3.1 RS 232/RS 422 conversion The prepared interface plug is converted to an RS 422 form using a standard bridge. The interface plug reverts to the RS 232 form on removal of the bridge. Please note: Bridging may only be carried out within the plug module. PIN Signal designation RS 232 RS 422 Input/ output 1 2 3 4 5 6 7 8 9 – E A – – – – _ – NC RxD TxD NC GND NC NC NC NC RxD– RxD+ TxD+ TxD– GND NC jumpered RS 422 NC Fig. 8-4: Interface plug jumper soldered soldered Fig. 8-5: Convertible interface plug (RS 422 pre-selected) 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 19 3 Chapter 8 LMS 200/LMS 291 electrical installation Technical Description LMS 2… Laser Measurement System 8.3.2 Cable entry in plug module Cables can enter the plug module from above or from the rear. Please note: In order to ensure that the scanner is sufficiently sealed (IP 65), the LMS must always be provided with plug modules – even if the interface is not in use. The plug modules must be provided with breech screws or PG cable glands with seals and SUB-D device plugs. Fig. 8-6: Plug module structure 8.3.3 Functions of the indicator lights rot red gelb yellow green grün Fig. 8-7: The indicator lights on LMS 200/LMS 291 State of system LED green Initialising (start) 0 OK, all fields clear 1 Field infringed (A, B, C) 0 Download 1 Restard requested; 0 Restard timed (Field A) ContaminationWarning Contamination0 Error Error 0 LED yellow 1 0 0 1 1 LED red 1 0 1 0 1 Indication static • • • • • LED yellow frequency Error signal (OUT C) 1 1 Hz 50% on/50% off 1 1 1 Hz 1 Hz 90% on/10% off 90% on/10% off 1 1 1 Hz 1 Hz 10% on/90% off 10% on/90% off Fatal Error 0 1 1 1 Hz 1 Hz 50% on/50% off 50% on/50% off Switching signal on OUT C alternatively as field output or error signal (higher priority) Tab. 8-1: Functions of the indicator lights 20 4 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Synchronisation of two laser scanners Chapter 9 LMS 2… 9 Synchronisation of two laser scanners If two LMS units are operated in close vicinity to each other, e.g. for measuring packages, there may be mutual interferences under certain circumstances. In order to prevent this the rotating mirrors of the two LMS units can be synchronised. The mirrors are then maintained in a position displaced by 180° relative to each other. In the process one LMS is defined as the MASTER, the other the SLAVE. 9.1 Pre-conditions for synchronisation Scanners are capable of synchronisation from software version 02.03 and above and hardware class serial no. 9919... and above. The scanners are wired according to the wiring plan Fig. 9-1 below. Fig. 9-1: Connection diagram synchronisation 9.2 Procedure • • • • • • Wire scanners with power supply cables from the connection set The maximum length of each of the supply cables should not exceed 5 m Both scanners must be supplied from a common mains adapter The separation of the power supply for the two scanners must first take place in the connection box (see 14 Order numbers) The MASTER output OUT C is connected to the SLAVE RESTART Wire a pull-down resistance of 470 Ω/2 W to GND_EXT (supplied with the connection box). The linkage takes place in the connection box. The remaining scanner outputs can be led from the connection box to the switching cabinet without any further measures being taken. The scanner data cables must not be wired through the connection box. Observe instructions in the Technical Description when selecting the type of interface and acceptable cable lengths. 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 21 1 Chapter 9 Synchronisation of two laser scanners Technical Description LMS 2… Laser Measurement System 9.3 Commissioning synchronisation Reaction of the scanners on power-on • The MASTER gives out its synchronisation pulse immediately after configuration has taken place • The SLAVE independently synchronises itself after RESET or POWER ON Synchronisation behaviour of the SLAVE Possible states after RESET during the synchronisation phase SLAVE (LEDs) red yellow green approx. duration max. 45 s 1 Waiting for synchronisation signal 100% 50% 0.5 Hz 0% from MASTER 2 Synchronisation phase 100% 100% 100% (adaption of the number of rotations) 3 Synchronisation adjusted to 100% 0% 100% appr. 4 s pre-defined phase state 4 Synchronisation completed 100% 100% 0% *) 5 Scanner operating state OK 0% 0% 100% Error 100% 0% 0% *) *) If the synchronisation process has not been completed after 100 seconds the process is aborted and an error displayed. The LED indicators of the MASTER act as in standard mode (see Chapt. 8.3.3). After synchronisation has taken place in the initialisation phase, the synchronisation status is cyclically controlled and monitored. On loss of synchronisation for a period longer than 10 seconds and shorter than 30 seconds an info is entered in the SLAVE error log. On loss of synchronisation for a period longer than 30 seconds an error is entered in the SLAVE error log. If the SLAVE is able to synchronise itself again, the error entry is deleted or saved as a non-current error. In synchronisation mode the MASTER suffers just one restriction, namely that output OUT C cannot be used for the field monitoring function. Please note: The connection box corresponds to enclosure rating IP 65, but IP 54 on use of the PG 11 and PG 16 screw joints. If enclosure rating IP 65 is required, the appropriate PG screw joints are to be used (Tradeware). 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 94 1 57 130 Fig. 9-2: View into connection box for synchronisation 22 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Heating plate Chapter 10 LMS 2… 10 Heating plate for the LMS 200/LMS 291 A supplementary heating plate is required if scanners with IP 65 housings are operated below 0° C. The heating plate is mounted between the back plate of the scanner and the standard mounting set. The temperature of the heating plate is controlled internally by a thermostat. Attention should be paid to ensure that the heating plate lies level on the scanner rear and that the transfer of warmth is not hindered. The connection terminals for the power supply are below the cover. Conventional cables can be used for connection. The device is to be safeguarded with an FI safety switch. Technical data (electrical) Power supply 230 V AC ± 10% Power uptake 30 W (cyclic, thermostat-controlled) Peak current on power on < 2.5 A Supply line cable entry PG 9 Supply line wire cross-sections up to 1.5 mm2 Technical data (mechanical) Protection category IP 65 Operating temperature –12…+50 °C Heating-up time at –12 °C max. 20 min. Storage temperature –20…+70 °C Dimensions see Fig. 10-1 Weight approx. 1.2 kg Table 10-1: Heating plate technical data 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 23 1 24 2 © SICK AG · Division Auto Ident · Germany · All rights reserved Connection cable connection cable (shown without terminal compartment cover with PG9 cable gland) Use 30 mA FI safety switch Installation of LMS with heating plate: terminal compartment either pointing up or down. Cable exit 1 x PG9 Cover with PG9 mountable on the left or right. Heating plate protection category IP 65 4 M8 x 15 screws Heating plate ATTENTION! Safety cable must be connected. Connection of the heating plate Mounting set 1 SICK order no.: 2015623 4 M6 x 30 screws Chapter 10 Technical Description LMS 2… Laser Measurement System Fig. 10-1: Mounting the heating plate on the LMS 200/LMS 291 8 008 970/06-2003 Technical Description Weather protection Heating plate Chapter 10 LMS 2… 292 34,25 57 65 200 268,5 246,5 450 650 25° 69 11,5° 64,3 292 101,7 ø40 101,7 40 76 113 113 76 242 400 ,5 82 R 381,5 ø40 40 5 32 R 290 290 380 380 Fig. 10-2: Dimensions of weather protection for LMS 220/LMS 221 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 25 3 352 351,5 26 2 centre of light exit 111 centre of rotating mirror wheel space required for plug approx. 65 3 x PG11 for cable Ø 5…12 mm Dimensional drawings © SICK AG · Division Auto Ident · Germany · All rights reserved Replaceable drying agent cartridge M5 - 10 deep (8x) for mounting a sunshade sheet or something similar. Not to be used for mounting device. M8 - 9 deep (4x) Chapter 11 Technical Description LMS 2… Laser Measurement System 11 Dimensional drawings Fig. 11-1: LMS 211 dimensions 8 008 970/06-2003 8 008 970/06-2003 LMS 211 - S12 only 111 3 x PG11 for cable Ø 5…12 mm 125 125 © SICK AG · Division Auto Ident · Germany · All rights reserved Replaceable drying agent cartridge M5 - 10 deep (8x) for mounting a sunshade sheet or something similar. Not to be used for mounting device. LMS 211 - S12 only M8 - 9 deep (4x) Dimensional drawings LMS 211-S12 with motorflap connectable centre of light exit centre of rotating mirror wheel space required for plug approx. 65 Dust prevention shield can be swung upwards to clean front window Technical Description LMS 2… Chapter 11 Fig. 11-2: LMS 211 dimensions with dust prevention shield 27 3 centre of light exit space required for plug approx. 65 28 4 111 centre of rotating mirror wheel 3 x PG11 for cable Ø 5…12 mm Dimensional drawings © SICK AG · Division Auto Ident · Germany · All rights reserved Replaceable drying agent cartridge M5 - 10 deep (8x) for mounting a sunshade sheet or something similar. Not to be used for mounting device. M8 - 9 deep (4x) Chapter 11 Technical Description LMS 2… Laser Measurement System Fig. 11-3: LMS 220/LMS 221 dimensions 8 008 970/06-2003 Technical Description Dimensional drawings Chapter 11 LMS 2… centre of mirror wheel 93 centre of light exit plug-in area approx. 265 Fig. 11-4: LMS 200/LMS 291 dimensions 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 29 5 Chapter 11 Dimensional drawings Technical Description LMS 2… Laser Measurement System Mounting set 1+2+3 183 Mounting set 1 for M6 countersunk screws countersinking DIN 74-Am6 Mounting set 1+ 2 Mounting set 1+2 66,6 Fig. 11-5: Mounting sets 1, 2, and 3 dimensions 30 6 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Dimensional drawings Chapter 11 LMS 2… 160,4 ± 7,5° 100 9,5 14 100 51 ± 7,5° 155 centre optical Achse axis Mitte of optische 35 Fig. 11-6: LMS 211/LMS 221/LMS 220 mounting set 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 31 7 Dimensional drawings Chapter 11 Technical Description LMS 2… Laser Measurement System Installation Use 3rd axis available as order number 2020926 Mounting on profiles (types 80x80): 4x sliding block 8StM6, heavy 4x screws 4x washers (not included in delivery) 40 Mounting dimensions with 3rd axis without 3rd axis weight without 3rd axis 4,8 kg, with 3rd axis 6,3 kg Fig. 11-7: LMS 200 fine adjustment mounting set 32 8 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Overview of LMS variants Technical Description Chapter 12 LMS 2… 12 Overview of LMS variants LMS type Scanning angle Resolution/typ. measurement accuracy Typ. range with 10% reflectivity Heating Fog correction Relay LMS 211-30206 100° 10 mm/± 35 mm 30 m ✓ ✓ – LMS 211-S07 100° 10 mm/± 35 mm 30 m ✓ ✓ ✓ LMS 211-30106 100° 10 mm/± 15 mm 10 m ✓ – – LMS 221-30206 180° 10 mm/± 35 mm 30 m ✓ ✓ – LMS 221-S07 180° 10 mm/± 35 mm 30 m ✓ ✓ ✓ LMS 291-S05 180° 10 mm/± 35 mm 30 m – ✓ – LMS 200-30106 180° 10 mm/± 15 mm 10 m – – – LMS 220-30106 180° 10 mm/± 15 mm 10 m ✓ – – Table 12-1: Overview of LMS variants Scanner functions Function Monitored fields, static LMS performance characteristics • rectangular • segmented (and teach-in) Number of field sets 2 Switching field sets external button or contact or telegram 3 Switching outputs 24 V DC Switching outputs LMS 211/221 alternative with relay contacts Subtractive fields Field evaluation Restart after field infringement Temporary field set Measured value transfer in real-time (500 kBd) Selectable baud rate: 9.6 kBd, 19.2 kBd, 38.4 kBd, 500 kBd Measurement range in mm Measurement range in cm Conversion of polar co-ordinates into Cartesian co-ordinates Measured value flags Minimum perpendicular distance Measured value output 2 yes • scan-oriented (blanking possible) • pixel-oriented (no blanking) • contour as reference • direct restart • restart after defined delay • restart interlock yes Remarks Default settings, delivery condition dynamic fields possible A, B, C segmented, via LMI 400 each 50 mm radial (indoor) each 5 cm radial (outdoor) expansion to 4 field 2 sets with LMI 400 further logical linkages possible via LMI 400 further 6 with LMI — monitored areas = field A minus field B normally open pixel-oriented no blanking 2 scans multiple reading external button for direct, switching field set without time delay or restart field defined via external software (online) yes yes up to 8 m/16 m/32 m up to 80 m yes 500 kBd required for real-time transfer range selectable max. 200 measured values as Cartesian co-ordinates data output supplementary information, e.g. for navigation using reflector marks 9.6 kBd parity: none mm, indoor-LMS cm, outdoor-LMS polar co-ordinates • infringement of field A, B, C fields A, B; dazzle or • detection of reflector or • dazzle, field A, B yes measured values for fields A, B, C • all measured values of a scan • averaged measured values (up to 250 scans) measured values on request • measured values for partitioned sector • averaged measured values for partitioned sector (up to 250 scans) Table 12-2: Overview of scanner functions 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 1 33 Chapter 13 Technical data Technical Description LMS 2… 13 Technical data Definition measuring accuracy Resolution The resolution of a measuring device is the smallest possible distance different from zero between two consecutive individual measurement values. The resolution can be reduced by using averaged values. Systematic error Systematic error is the sum of all the deviations over a defined excent of range and reflectivity, which cannot be reduced even using averaged values. Standard deviation The standard deviation is calculated using at least 100 measurement values of a target with a certain reflectivity at a certain distance with a certain amount of illumination. resolution 0.25° not possible in the monitoring fields mode. General Range max. 80 m (see Chapter 4) Angular resolution 0.25°1)/0.5°/1° (selectable) Response time 53 ms/26 ms/13 ms Measurement resolution 10 mm System error (environmental conditions: good visibility, Ta=23°C, reflectivity 10%…10,000%) LMS 200-30106/ LMS 220-30106 LMS 211-30106 typ. ± 15 mm (mm-mode), range 1…8 m typ. ± 4 cm (cm-mode), range 1…20 m LMS 211/LMS 291/ LMS 221-30206 typ. ± 35 mm (mm-mode), range 1…20 m typ. ± 5 cm (cm-mode), range 1…20 m Statistical error standard deviation (1 sigma) typ. 5 mm (mm-mode) (at range ≤ 8 m/ ≥ 10 % reflectivity/≤ 5 kLux) typ. 10 mm (mm-mode) (at range 1…20 m/ ≥ 10 % reflectivity/≤ 5 kLux) Electrical Data interface RS 232/RS 422 (configurable) Transfer rate 9.6/19.2/38.4/500 kbaud Switching outputs, standard variants 3xPNP; typ. 24 V DC OUT A, OUT B max. 250 mA, OUT C max. 100 mA Switching outputs, relay variants OUT A, OUT B (relay) max. switching voltage 48 V DC/26 VAC (protected low voltage, safe isolation from mains) max. switching current 0,7 A; max. switching power 30 W OUT C/weak (PNP) typ. 24 V DC, max. 100 mA Supply voltage (scanner-electronics) 24 V DC ± 15% (max. 500 mV ripple) current requirement max. 1,8 A (incl. output load) Supply voltage (heating, LMS 211/220/221 only) 24 V DC (max. 6 V ripple) current requirement max. 6 A (cyclic) Power consumption approx. 20 W (without output load) plus heating with approx. 140 W Electrical protection class safety insulated, protection class 2 Laser protection class 1 (eye-safe) Interference resistance acc. to IEC 801, part 2-4; EN 50081-1/50082-2 Operating ambient temperature 0…+50 °C (LMS 291 also) Storage temperature –30…+70 °C 1) Angular Mechanical LMS 200-30106/LMS 291-S05 –30…+50 °C (warming-up time approx. 120 min.at Tmin), LMS 220/211-30106 LMS 211/220/221 Enclosure rating IP 65 IP 65 and IP 67 Weight approx. 4.5 kg approx. 9 kg Dimensions see Chapter 11 Dimensional drawings Vibration fatigue limit acc. to IEC 68 part 2-6, table 2c, frequency range 10…150 Hz, amplitude 0.35 mm or 5 g single impact IEC 68 part 2-27, table 2, 15 g/11 ms permanent vibration IEC 68 part 2-29, 10 g/16 ms Shock absorbers are recommended for heavy vibration and impact demands (e.g. AGV applications). Table 13-1: Technical data 34 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06 -2003 Technical Description Order numbers Chapter 14 LMS 2… 14 Order numbers Laser scanners, indoor LMS 200-30106 LMS 220-30106 LMS 211-30106 Laser scanners, outdoor LMS 211-30206 LMS 221-30206 LMS 291-S05 LMS 291-S14 LMS 211-S07 (relay outputs) LMS 221-S07 (relay outputs) LMS 211-S14 LMS 211-S13 LMS 211-S12 LMS 211-S14 Laser scanners (housing not lacquered) LMS 209-S02 (technical data as LMS 200) Order no. 1015850 1015945 1025629 Order no. 1018023 1018022 1018028 1025329 1018966 1018965 1025487 1021214 1023952 1025328 Order no. 1016414 LMS 200/LMS 291 accessories Mounting set 1 Mounting set 2 Mounting set 3 Fine adjustment mounting set 3rd axis for fine adjustment Connection set 1, power supply and interface plugs (without cables) Connection set 2, power supply and RS 232/RS 422-interface plugs (5 m cable each) prepared for RS 422 Connection set 3, power supply and RS 232/RS 422-interface plugs (10 m cable each) prepared for RS 422 Interface cable 1, connection LMS – PC for setting parameters/configuration RS 232, cable length 3 m Interface cable 2, connection LMS – PC for setting parameters/configuration RS 232, cable length 5 m Heating plate 2015623 2015624 2015625 2002925 2020926 2018963 2018964 2018965 2016401 2016402 2019522 LMS 211/LMS 220/LMS 221 accessories Mounting set (wall mounting) Mast attachment set (mounting set required) Tightening strap (per metre) Tightening strap lock Dust prevention shield (for LMS 211 only) Dust prevention shield with motor flap (for LMS 211 only) Weather protection (for LMS 220/221) Interface cable, connection LMS – PC for setting parameters/configuration RS 232/422, cable length 5 m Purging air fan Table 14-1: Order numbers (continued on next page) 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 2018303 2018304 5306222 5306221 2017722 2018306 4034559 2019561 on request 35 1 Chapter 14 Order numbers Technical Description LMS 2… Laser Measurement System continued Table 14-1: Order numbers General accessories Data cable, weatherproof, 2x2 twisted pair, per metre High-speed serial PC card, 2x RS 422, 500 kbaud, ISA bus Mains adapter 24 V DC/2,5 A (suitable for parallel operation) Mains adapter 24 V DC/4 A (suitable for parallel operation) Mains adapter 24 V DC/10 A Scanfinder (alignment aid) Synchronisation connection box 6011103 6011807 6010361 6010362 6011156 6020756 2021520 Documentation (included in delivery LMS) Order no. 8008969 8008970 Technical Description (German) Technical Description (English) User-Software Operating Instructions with software on 3,5“-diskette (DE), German (EN), English Telegram listing (DE), German (pdf file in user software) Telegram listing (EN), English (pdf file in user software) LMS 200/LMS 291 spare parts Front window LMS 211/LMS 220/LMS 221 spare parts Drying agent cartridge Device plug with housing 16-pin plug insert System application/expansions LMI 400 (area monitoring expansion) LMI 101 (measuring bulk materials) LMI 200 evaluation and control unit for measurement applications Customer-specific evaluations 2018307 2018311 – – Order no. 2016408 Order no. 5306179 2018301 6004379 Order no. 1013863 7044000 1016761 on request Table 14-1 (cont.): Order numbers 36 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description Glossary of terms Chapter 15 LMS 2… 15 Glossary of terms 8 008 970/06-2003 Monitored fields Freely programmable zones (spaces); if an object is in a particular zone a switching signal is given out. Field set Consists of 2 or 3 individually definable fields (field A, B or field A, B, C). 2 field sets can be stored in the LMS, up to 4 field sets in the LMI 400 Field set switching Change between different field sets. Field set 1 or 2 is active in the LMS; in the LMI 400 two field sets can be activated simultaneously. Switching takes place at the reset input (24 V DC, static or SW telegram) for the LMS, and via separate control inputs for the LMI (24 V DC, static or SW telegram). Subtractive fields Allows a zone to be monitored that is the “space remaining” when field B is deducted from field A. Restart, automatic The particular switching output of a field is re-activated immediately after the field is freed of infringement. Restart, after delay The particular switching output of a field is re-activated a defined period of time after the field is freed of infringement. Restart, with button The particular switching output of a field is re-activated when an external button is pressed after the field is freed of infringement. Temporary field A field form can be defined and activated by external data information, transfer time about 200 ms (temporary because when the power supply is removed the field is lost). Dynamic field Only with LMI 400; fields can be automatically changed in form and size depending on a shaft encoder input (e.g. speed in an AGV application). Blanking Is set in cm as the so-called blanking factor. The blanking factor defines the minimum object size that can lead to registration at the switching outputs. Note: blanking is only possible in conjunction with scan-oriented evaluation (not in conjunction with pixel-oriented evaluation). Field evaluation To prevent erroneous switching caused by particles, etc. fields are evaluated using various processes (scan-oriented or pixeloriented, always in conjunction with multiple reading). Scan-oriented evaluation With scan-oriented evaluation a field infringement at any particular location is stored and verified using multiple readings. If subsequent scans register further infringements at this particular location the particular field switching output is activated after the number of multiple readings defined have registered positive infringement. Pixel-oriented evaluation In contrast to scan-oriented evaluation, with pixel-oriented evaluation every single beam of the scanner is evaluated. This method is best suited for increasing availability in rain and snow. Contour as reference This function monitors the surrounding area of a monitored field. In other words, an object’s existence (e.g. house wall) is constantly being verified. If this contour ceased to be registered the corresponding switching output would become active even without any infringement of the field. The range of validity of the reference contour can be set as desired. This function can also be used to prevent sabotage. © SICK AG · Division Auto Ident · Germany · All rights reserved 1 37 Chapter 15 EC Declaration Technical Description LMS 2… Laser Measurement System Fig. 15-1: Reproduction of the EC Declaration of Conformity, page 1 (reduced in size) 38 2 © SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 970/06-2003 Technical Description EC Declaration Chapter 10 LMS 2… Fig. 15-2: Reproduction of the EC Declaration of Conformity, page 2 (reduced in size) 8 008 970/06-2003 © SICK AG · Division Auto Ident · Germany · All rights reserved 39 3 8 008 970/06-2003 · SM/SM . Printed in Germany (06-2003) . Subject to change without prior notice . PreE4105 c Received from your SICK partner: SICK AG Auto Ident Nimburger Straße 11 79276 Reute Germany www.sick.com